求助！！！help!!!!

shshy

今天购买了个PHP空间，域名也解析好了，上传了个PHP程序进去，输地址进去，就显示如下：
You don't have permission to access /install/index.php on this server.
Additionally, a 404 Not Found error was encountered while trying to use an ErrorDocument to handle the request.

是不是空间有问题？？？

做个简单的htm格式的网页放进去，又可以显示。

HELP ME !!!